What was the SIZE of the Gray Sandpiper-like bird you saw in Minnesota?

Red Knot: This medium-sized sandpiper has black, brown and gray scaled upperparts, a red-brown face, neck, breast and sides, and a white lower belly. It has a slightly curved black bill. The wings show white bars in flight. Diet includes insects, larvae, mollusks and crabs. It has a swift direct flight with rapid wing beats. Sexes are similar.

Red Phalarope: This medium-sized sandpiper has dark gray upperparts and rufous neck and underparts. It has a white face, black cap, and a thick, straight, yellow bill with a black tip. The female is more brightly colored than the male. Feeds on small fish, insects and aquatic invertebrates. Flight is swift and direct with rapid wing beats.